i have been working on the jigless project for about 3.5 years now (and riding the outcomes for about 25,000 km).
i will be happy to get insights and any other feedback http://igg.me/at/jigless/x/3947143 you might have regarding the [B]jigless[/B ]idea. please share and support if you find it interesting. thank you.
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Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder
There is a reason why every one doesn't make their own frames, it's not as easy as some will claim.
Having said that- jiggles frame building was the earliest method and continues to this day. There's no mystery, no new claims. Been there and done that by hundreds (likely thousands of builders) before.
Regardless of the manor of holding the tubes in the correct positions (and even hose clamps or vee blocks on a drawing are jigs in the most basic sense) good care with all the rest of the job is needed to result in a quality, straight, reliable and nice handling frame. Using more involved tube locating methods only makes some aspects of building easier to do with less problems. Andy.
Don't forget the lugged and epoxy bonded early aluminum frames, as well as the early carbon fiber frames epoxy bonded with aluminum or titanium lugs. In fact many still use bonded dropouts.
Your "lego frame" looks interesting, although I wonder how well the 3D printed joints will last. Do they get some kind of a fiber reinforcement?
You also have to make sure your design takes into account that some parts such as the seatstays are generally under compression while other parts such as the chainstays and downtube are under tension (as well as varous torsion stresses).
Interesting side point is that the current issue of the Gougeon mag indicates they will not longer be selling their Al etch kit for 205/105/ epoxy. They are getting better bond strength results from Gflex epoxy. Which is easy to use. Info on Epoxyworks site.